Will she cheat with him, maybe ? Will she cheat with the man from the market, she may, is is already cheating with a neighbor how knows?

It is a matter of trust and how a relationship is going.

Time to talk to her, without fighting or yelling

First, print out this exchange and keep it somewhere safe,, you may need it in divorce court.
You have to confront her with it. You can't walk around with this eating at you day in and day out.

Have you talked to her yet? How did it go